Nailing strip or block



Sept. 25, 1928. 1,685,491

C. M. JOHNSON MAILING s'mxr ba BLOCK Filed July 22, 1927 ,1

luv 5% I g 1 [720672207 (22rd fZJo/uzson.

50%5569 [MAM igflwwh Patented Sept. 25, 1928.

UNITED STATES PATENT OFF ICE.

CARL M. JOHNSON, OF'CHICAGO, I LLINOIS. Y

NAILING STRIP 'OR BLOCK.

Application filed July 22,

. interposed between adjacent blocks of masonry, and particularly hollow tile, in such manner that it is not dependent entirely upon the mortar or plaster for holding it between the blocks; to provide a ground block of this character which has the opposite edges therei of of greater width than the body of the block in such manner as to provide a head for engagement with the masonry blocks so that such nailing strip is positively retained in the wall; and to provide a nailing strip particularly adaptable for use in connection with the standard hollow tiles which have longitudinal grooves onthe sides and ends thereof, such nailing strip also being provided with complementary grooves for registering with the grooves in the tile so that mortar or cement squeezed between the strip and tile will form keys which look the nailing strip securely between the tiles.

An illustrative embodiment of this inven tion is shown in the accompanying drawings, in which: I

Figure 1 is a fragmentary horizontal cross section of a hollow tile wall at the point where two tiles abut against the improved form of nailing strip.

Fig. 2 is a fragmentary view in perspective of the improved nailing strip.

Fig. 3 is a reduced fragmentary view in perspective of the improved nailing strip in place in a tile wall construction.

Heretofore it has been customary to provide nailing strips which have been of uniform thickness throughout their length and breadth, or in some instances the nailing strip has been tapered in one direction. Such blocks have had to depend almost entirely upon their adhesion to the cement or mortar in which they were embedded for retaining them in the wall.

In the present invention the nailing strips are provided at their opposite lateral edges with a widened portion, which in cross section form heads which protrude at the opposite sides of the wall. The blocks forming the wall fit snugly under these heads at each side so that the blocks are retained in the wall entirely independent of their adhesion to the cement or mortar in which they are set.

Furthermore, in the present invention, the

1927. Serial No. 207.706.

opposite faces of the nailing strip are pro- 7 vided with a plurality of longitudinally disposed grooves, which are spaced the same as the standard grooving on the edges of the ordinary hollow tile. \Vhen these blocks are set properly in mortar or cement between the edges of the tile, the cement forms a plurality of keys whichalso firmly lock the nailing strip in place.

In the construction shown in the drawings, I

the improved nailing strip consists of a relatively thin elongated block of wood or similar material 1, the opposite lateral edges 2 and 3 of which are of greater thickness in cross section than the remainder of the strip, thus forming heads which are adapted to'protrude at opposite sides of the wall in which the block is embedded.

The opposite faces of the web port-ion of-the strip are provided with a plurality of longitudinally disposed grooves 4, which are preferably spaced so as to register with the standardgrooving in the edges of the standard hollow tile. The Web portion of the block may also be provided with a plurality of apertures 5 bored therethrough so that when the block is embedded in the cement or mortar of the wall it will be joined through these apertures 5.

In the use of this improved block, it is embedded in a wall, as shown particularly in Fig. 1, wherein a standard hollow tile 10 has its edge covered with cement 11, the block 1 placed thereagainst, the face of it covered with cement, and then the next block 12 abutted snugly against the nailing strip. The opposite edges 2 and 3 of the nailing strip protrude slightly beyond the face of the wall, and the width of the nailing strip is such that the adjacent corners of a standard size hollow tile will abut snugly underneath the head portions 2 and 3 of the nailing strip so as to hold it securely in position independent of the cement or mortar.

The cement or mortar forms a plurality of keys 15, half of which are in the tile, and the other half of which are in the nailing strip. The mortar also passes through the apertures 5 so as to form transverse connecting keys at the various points. Furring strips 16 may then be secured by nails or the like, 17, to the nailing strips.

With the use of these strips, when the mortar or cement has dried and the wall at any future time should be subjected to a hard shock, so as to crack or break the mortar or cement in which. the Wall is laid, these nailing strips Will remain tightly in place and will not work loose and come out, as they are retained in the Wall entirely independent of the-mortar in which they are laid.

Although but one specific embodiment of this invention has been herein shown and (le scribed, it Will be understood that details of the construction shown may be altered or omittedwi-thout departing from the spirit of this invention as defined by the following claims I'claim; V 1. A nailing strip of the class described comprising a relatively thin, flat elongated strip having the opposite lateral edges there of of greater thickness than the connecting Webportion therebetiveen, so that said relatively thick edges overlap the outer si de faces ofa pair ofadjacent building blocks When said blocks are 'abutted'against the opposite sides respectively of saidweb portion and having a plurality of longitudinal grooves in.

said Web portion, for cooperating With a building block having similar registering grooves therein to form keyvvays for same.

2. Avnailing strip of the class described 7 comprising a relatively thin, flatrelongated strip having the opposite lateral edges thereof of I greater thickness than connecting web portion therebetween, so that said relatively thick edges overlap the outer side faces of a pair of adjacent building blocks when of a pair of adjacent building blocks when said blocks are abutted against the opposite sides respectively of said Web portion; having a plurality of longitudinal grooves in said Web portion for cooperating with a building block having similar registering grooves therein to form keyways for cement and having a plurality of apertures extending through said Web portion, said apertures communicating with said grooves. y 1 Signed at Chicago this 20th day of July,

' e CARL M. JOHNSON. 

